Results 21 to 30 of about 21,056 (199)

Exerting DNA Damaging Effects of the Ilimaquinones through the Active Hydroquinone Species

open access: yesScientia Pharmaceutica, 2021
Possessing the quinone moiety, ilimaquinone (1), a sponge–derived sesquiterpene quinone, has been hypothesised to express its cytotoxicity through a redox cycling process, yielding active product(s) that can cause DNA damage.
Apisada Jiso   +4 more
doaj   +1 more source

Cytotoxic Compounds of Two Demosponges (Aplysina aerophoba and Spongia sp.) from the Aegean Sea

open access: yesBiomolecules, 2021
The class of demosponges is the biggest and most diverse of all described sponge species and it is reported to produce a plethora of chemically different metabolites with interesting biological activities.
Maria Orfanoudaki   +9 more
doaj   +1 more source

Regioselectivity of conjugate additions to monoalkyl-1,4-benzoquinones [PDF]

open access: yesJournal of the Serbian Chemical Society, 2002
The regioselectivity of the reaction of conjugate addition of thiols, amines, methanol and hydrogen chloride with the monoalkyl-1,4-benzoquinones avarone and 2-tert-butyl-1,4-benzoquinone was investigated.
SNEZANA TRIFUNOVIC   +5 more
doaj   +3 more sources

Hydroquinones Including Tetrachlorohydroquinone Inhibit Candida albicans Biofilm Formation by Repressing Hyphae-Related Genes

open access: yesMicrobiology Spectrum, 2022
Candida albicans is an opportunistic pathogenic fungus responsible for candidiasis. The pathogen readily forms antifungal agent-resistant biofilms on implanted medical devices or human tissue.
Yong-Guy Kim   +5 more
doaj   +1 more source

Norhierridin B, a New Hierridin B-Based Hydroquinone with Improved Antiproliferative Activity

open access: yesMolecules, 2020
Hierridin B (6), a methylated hydroquinone isolated from the marine picocyanobacterium Cyanobium sp. LEGE 06113, moderately inhibited the growth of colon adenocarcinoma HT-29 cells.
Pedro Brandão   +10 more
doaj   +1 more source

Quinone and Hydroquinone Metabolites from the Ascidians of the Genus Aplidium

open access: yesMarine Drugs, 2014
Ascidians of the genus Aplidium are recognized as an important source of chemical diversity and bioactive natural products. Among the compounds produced by this genus are non-nitrogenous metabolites, mainly prenylated quinones and hydroquinones.
Camila Spereta Bertanha   +6 more
doaj   +1 more source

Laccase-Catalyzed Derivatization of Antibiotics with Sulfonamide or Sulfone Structures

open access: yesMicroorganisms, 2021
Trametes spec. laccase (EC 1.10.3.2.) mediates the oxidative coupling of antibiotics with sulfonamide or sulfone structures with 2,5-dihydroxybenzene derivatives to form new heterodimers and heterotrimers. These heteromolecular hybrid products are formed
Annett Mikolasch, Veronika Hahn
doaj   +1 more source

Reduction of Benzoquinones to Hydroquinones via Spontaneous Reaction with Glutathione and Enzymatic Reaction by S-Glutathionyl-Hydroquinone Reductases [PDF]

open access: yes, 2016
S-Glutathionyl-hydroquinone reductases (GS-HQRs) are a new class of glutathione transferases, widely present in bacteria, halobacteria, fungi, and plants.
Lam , L.K. Metthew   +3 more
core   +1 more source

2-Amino-4-(4-methoxyphenyl)-1-(4-methylphenyl)-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carbonitrile

open access: yesIUCrData, 2018
In the title compound, C24H23N3O2, the cyclohexene and 1,4-dihydropyridine rings of the 1,4,5,6,7,8-hexahydroquinoline ring system each adopt a twisted-boat conformation. The dihedral angle between the benzene rings is 13.89 (10)°.
Asmaa H. A. Tamam   +5 more
doaj   +1 more source

Cytotoxic Terpene Quinones from Marine Sponges

open access: yesMarine Drugs, 2010
The 1,4-benzoquinone moiety is a common structural feature in a large number of compounds that have received considerable attention owing to their broad spectrum of biological activities.
Marina Gordaliza
doaj   +1 more source

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